Lubricant-expelling apparatus



' -H. .1.. MURPHY LUBRICANT VExPELLm; APPARATUS Oct. y16, 1928. v

17a/vena?.-

' -Filed Feb.)v l1, 1925 ',Patentedfot. 16.1928@ l UNITED srAjrES HOWARD JQMnHY, oFREADIN'G, EAssAoHnsn'r'rs-Assreivoirr masiva .Agssreiinanars,- ro THE BAssrox MANUFAcrrUnING commun or-cHIcAeo,j1LL1 No 1s,v-A

'nunnxclmnnxrnrmriqe APPARATUS;

I This invention aims oo provide improve;v

ments in lubricant-expelling apparatus.

. This-valve 12,is guidedjiny a valve In the drawings, Which'illustrate a pre- 'l ferred embodiment-.o-fmy invention `passes and at the opposite end witlia passa e Figurel is-aksection ofy'a'high pressure-.lnor high pressure chamber 18 bricantexpelling' device, beingpartlyihelel small cross-sectional area. l

ivation;

L '-Ihe body part 1 alsov carries .Fig2 is .al section similar to that'sho'wn in of relative y t .10 thefef' when lubricant iS beine'expelle lubricant-receiving nipple;v

" Fig. 4 is all enlar l Fig. v1,"out lshowing the relation'of the 'arts of Fig. 2; and

-trated a device"for-forcingilubricant .to a

' lubricant-recei,vingl nipple under a relatively izo higher potential pressure'than'canbe obtained- K booster. oonnected'with alo-w'pressure' supply at by the use of the ordinary lubricant-,expelling evice having aplun rin abarrel `for forcing lubricant tothe nipp e.

While I haveillustratedthe device as a by aliexible hose it Willjbeunderstoodt the same type 'of booster may be. directly and rigidly secured to the lubricant'supply barrel of a lubricant-eirpelling dev-ice. i

The device illustrated includesa body partl.

having a front head 2, presenting a reduced. portion 3 externally threaded to receive 'a nozzle sleeve 4.z The nozzle sleeye'4 presents pitchedfemale threads 5 for engagement With at its'out'er-end a'plurality of relatively steel corresponding male threads 6 `on a lubricant reoeivin nipple I Immediately back of the female treads 5; I have provided a shoulders. 8 which engages and holds imposition a.v nozzle centering part 9 and. 'a hat-shaped sealing' fwas'her 10. The reduced portion of the front head 2 is cored and threaded internally to re# ceive a valve seat part 11 which holds a valve 12 and valve spring 13 in assembled relation .with the front head 2, as illustrated in Figs. 1 and 2. e

The valve 12 is urged toward itsseat by the spring 13 bearing at one end against the front head 2 and at the`oth`er. against the valve. The valve 12 presents a forwardly extending portion 14 which is slotted at 15 to permit passage of lubricant into the nipple 7 when the valve is opened thereby, as'hereinafter described. i

ged section-on 'the line' Y nected with a relatively low-pressure source Fig. 5 is an enlarged section on the line 5%-5 /1 but herein shown as connected by' a flexible 4a sleeve 1 9.v which extends a substantial distance beyond the and has a-male thread 20 for'engage ment with -the'.female thread'21'of a'second ySleeve l22 surrounding the sleeve 19. This second -sleeve 22 has a coredl rear-'head .portion 23,.through which passes a conduit ,24Yco'nof lubricant supply in any vsuitable manner,

hose 25. lhe conduit 24 is held-in engage-` ment with the rear'head port-ion 23 by a collar 26. y'I he in'ner end of the conduit is threaded;

lfor engagement With a. plunger-carrying part 27, -which'has a plunger 2 8 secured to one end thereofand extending ntothe chamber 18.

This plunger-carrying part is coredto receive a ball check 29 seated against a seat'provided the plunger-carrying part and the'other end against the ball-check 29.

The plunger 28 passes stuffing -box 31 at the inner end` ofv thebody part ,1, which is packed with a hat Washer 32 surrounding the plunger to prevent leakage at the rear end ofthe chamber 18. The plunginthe end of the conduit 24 and'held againstY its seat by a spring 30 seated at one end against through a suitable eris also hollow to permit passage of-lubricant from the conduit 24 to the cli'ainbe'r 18.

Between the' shoulder 33 provided at the end of the body part 1 and the plunger-carrying part,l I have provided a relatively heavy spring 34' which assists in returning the`- I plunger to the real` end of `the chamber whenthe sleeve 22 is'turned in a contra-clockwise direction a's hereinafterdescribed..

The lubricant-receiving nipple smooth end portion 35 beyond the male threads 6, suliiciently long to support the booster. At the front end of thesmooth portion, I have provided a lubricantreceiving 'Zhasa' opening normally closed by a ball4 check 36' which may be opened by the pressure of the lubricant. The ball check is normally pressed toward its seat by a nipple spring`37 `(see Fig.-

Assuming that the core of the plunger- 'carrying part, the plunger28, the'chamber loa.

18 and tlie'valve guide chamber 16 havebeeii filled with lubricant from the low pressure supply tank (not shown) and assuming that the nipple 7 is secured to the part to be lubricated, the booster m`ay.be grasped by'the sleeve 22, and the nozzle may be introduced over the smooth end 35' of the nipple, which,

vcontacting with'the female threads 5' in the 2, until the end ofthe nipple abuts -against the stop shoulder -38 provided by the valve seat part 11. The valve now. being fully opened, further ,clockwise movement turns the sleeve 22 relative to the rest of the 'device so that the threads between Athe two sleeves 19 and 22 will feed tlieplunger 2 8 forward in the chamber 18, tliereb forcing the lubricant to a. clogged or tig t bearing ,under aj relatively high potential pi'essure--Lubricant cannot pass from the chamber back past the checkvvalve 29 and therefore -inust be forced out through the discharge end of the gun, as illustrated in Fig. 2. Byiturnin'g the i sleeve 22 in a contra-clockwise direction, the plunger 28, assisted by the spring 349 andthe pressure of the lubricant in the source of sup# ply, is drawn back in the chamber 18 until the set screw 40 (Fig. 1) abuts against the male thread 2O of the sleeve 19 to preclude further movement of the'sleeve 22'.` Atthfe same time lubricant iiows past the ball check 29 and refills the chamber 18A and the'operation of' expulsion of lubricant maybe re peated as above described, preferably by a relatively short oscillation of the sleeve 22, operatively advancing and retracting the checkvalve 29 relative to the check vali/e36 in the nipple, these balls alternatelyopening and closing.

High pressure Imay also be obtained by grasping the periphery ofthe front head2 or the body part 1, and turning the whole booster device in an oscillatory manner relative tothe nipple 7. As the nozzle is backed off the 'nippleto permit closing of the valve, 12, the lubricant Hows past the ball check 29 to fill any space between it and the valve 12. Thus,`as the device is turned in a clockwise direction again,'tlie valve 12 begins'to open and froml the moment' the valve opens the head of 'the nipple acts as a displacingplunger and compresses and forces the lubri` cant into the nipple under a 'relatively high potential press'ura'jthe -falterhate V )pera'ition sof the check valves 29 and 36 beingl as 'described in vconnection with oscillation of the 4.sleeve22. Y

' While I have shown and described a preferred embodiment of my invention, it Will in i be understood thatl changes involving;v omis-- sion, substitution, alteration and reversal of parts, and even'changes in the mode of operation, may be made without'departing from the scope of my invention, which is best defined in the appended claims.v

I claim:

ffl. Lubricating apparatus comprising, in'

combination, a'booster device for use with 4'devices expelling lubricant under relatively low pressure, sai-d booster device comprising,

in combinatiom a body part having a cylinder-bore and presenting at one end thereof a l nozzle'y for engagement witha `lubricant-receiving nipple, a closure valve 1n said nozzle openable by engagement with the nipple, a

i sleeve secured vto 4the other-'end ofsaid bodyff part,- a second sleeve surroundingsaidrst sleeve,A a displacing plunger of relatively small crosslsectionalarea operable in said cyl j indenbore, and securedto said second sleeve, a. checkvalve carried by said-'secondrsleeve' for preventing return of lubricant-to Ithe source of supply, and means operable by turning said second sleeve relativeto said first sleeve to move said plunger toward said ,closure valve thereby to lforce lubricant from said passage to the lubricant, receiving' nipple. under a relatively high potential pressure.

2. Lubricating 'apparatus comprising, in

\`combination, a booster device for use withA devices expelling lubricant underrelatively low pressure, saidbooster' device vcomprisin g, i'n combination, a body part having -a cylinder-bore and presenting at one end thereof a nozzle for engagement with a lubricant-receiving nipple, a closure valve in said nozzle openable by engagement With the nipbody part, a second sleeve surroundingsaid first sleeve, a displacing plunger of relatively ior.

-lio ple, a sleeve secured to the other end of said small cross-sectional area operable in said" cylinder-bore, and secured-to said second sleeve, a check valve vcarried bysaid second sleeve for preventing return of lubricant to the source of supply and male threads presented by, said first sleeve'cooperating with female threads presented by said second sleeve to move said plunger toward said clorelative to said viirst sleeve,tliereby to force 'lubricant to the nipple under'relatively high potential` pressure. 5

Lubricating apparatus sure valve when said second sleeve is turned combination, a booster device for use with devices expelling lubricant under' relatively low pressure: saidbooster device comprising, in combinatiom a body part having a Acylf 125 comprising, in

CII

inder-bore and presenting at one end thereof a nozzle for engagement with a lubricant-recei'ving nipple, a sleeve part at the opposite end of the body part presenting male threads, a second sleeve carrying a plunger operable in said cylinder-bore, a check valve carried by said second sleeve permitting flow of lubricant to said cylinder-bore while opposing How of lubricant in the reverse direction and fe.- male threads presented by said second sleeve for cooperative engagement with the male threads of said first sleeve to move said plunger forward in said chamber toeXp'el lubricant therefrom.

4. A vbooster for a lubricant compressor comprising a body part having a cylinder-l bore formed therein, means secured to one end of said body part Jfor making a sealed connection with a lubricant receiving nipple and for establishing A`communication between said cylinder-bore and 'said lubricantreceiving nipple, a sleeve secured to the other end of said body part, a member slidable within said sleeve and carrying a hollow plunger of relatively small cross-section, said hollow lung'- er being reciprocable within said cy inder'- bore, a conduitconnected with said member,

a non-return valve positioned between said conduit and said hollow plunger, and a second sleeve swiveled upon said conduit, said first named and second sleeves having athreadi ed connectlon for advancing and retracting said hollow plunger in said cylinder-bore by rotationv of said second sleeve relatively to' said first sleeve` 5. A boosterfor a lubricant compressor' comprising a body part having a cylinder# bore therein, means connected with ,one .end of said body part and communicating with said cylinder-bore for establishing sealed connection'with a lubricant receiving nipple, said means including a valve that is moved to its open position by receiving nipp1e,`a.pl'unger reciprocable in "valve in said passageway, a iieXi contact with said lubricant,

said. cylinder-bore, a conduit for supplying lubricant thereto, means for 4preventing return flow of lubricant through said conduit, rotatable means movable with respect to said conduit and said body partyand means between said rotatable means and said body part for eli'ectingreciprocating movement of said plunger upon `rotation of said-.rotaty able means.

6. A booster for a lubricant compressor comprising'` a body part having a cyli'nderbore therein, means connected with one end of said body part and communicating with said 'cylinder-bore for establishing sealed connection with a lubricant receiving nipple', a plunger reciprocable in said cylinder-bore, a conduit for supplying lubricant to said cylinder-bore, means for lpreventing return flow or" lubricant through said conduit., rotatable means movable with respect to said con-V duit and said body part, and means between said rotatable means and said body part for effecting reciprocating movement of said plunger upon rotation of said rotatable means.

7 In a booster for a lubricant. compressor, a body part having a high pressure cylinder therein, means'connected with one end of said I body part and communicating with said cylinder for establishing sealed connection with the lubricant receiving nipple, aplunger movable axially of said cylinder, said plunger havingla passageway therethrough, a check ble conduit for supplying lubricant.l -to said passageway and cylinder, a handle part rotatable relatively both to said cylinder and said flexible conduit and cooperating-screw threads for advancing said plunger upon rotation of saidhandle part. In testimony whereof, I have signed my name to this specification.

HOWARD J. MURPHY. 

